Jeep R4626054 Pump, Water

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After securing the new water pump to the engine, you should:a. Reinstall all parts that were removed for access to the pump.b. Refill the cooling system with coolant.c. Check the drivebelt tension.d. Run the engine and check for leaks.

It's important to exercise caution when checking the water pump with the engine running because you should keep your hands away from the fan blades to prevent injury.

There are three ways to check the operation of the water pump while it's installed on the engine. If the pump is defective, it should be replaced with a new or rebuilt unit. With the engine running at normal operating temperature, squeeze the upper radiator hose. If the water pump is working properly a pressure surge should be felt as the hose is released. Water pumps are equipped with weep or vent holes. If a failure occurs in the pump seal, coolant will leak from the hole. In most cases, you'll need a flashlight to find the hole on the water pump from underneath to check for leaks. If the water pump shaft bearings fail, there may be a howling sound at the front of the engine while it's running. Shaft wear can be felt if the water pump pulley is rocked up and down. Don't mistake drivebelt slippage, which causes a squealing sound, for water pump bearing failure.

Begin by disconnecting the negative battery cable.